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8182757 |
Method and apparatus for manufacturing of a calcium carbonate product, the product and its use
A method and apparatus for producing a calcium carbonate product formed of small <100 μm sized separate calcium carbonate particles. Calcium hydroxide is fed through a disintegration and spraying ...
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8153088 |
Method to prevent build-up of limestone in a lime slaker that is used for batchwise slaking of burnt lime
A method to prevent build-up of limestone in a slaker that is used for batchwise slaking of burnt lime is described, in which lime slurry is produced with a greater degree of fineness and prolonged...
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8124042 |
Nonwovens bonded with acrylamide/N-alkylolacrylamide crosslinking mixture with C2-C10 alkylol
An aqueous dispersion includes a self-crosslinking alkylolacrylamide containing interpolymer, the interpolymer being prepared in an emulsion polymerization medium by way of interpolymerizing in the...
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8114374 |
Carbonation of metal silicates for long-term CO2 sequestration
In a preferred embodiment, the invention relates to a process of sequestering carbon dioxide. The process comprises the steps of: (a) reacting a metal silicate with a caustic alkali-metal hydroxide...
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8066965 |
Process for recycling carbon dioxide emissions from power plants into carbonated species
A process is disclosed for recycling carbon dioxide emissions from a fossil-fuel power plant into useful carbonated species The process primarily comprises the steps of: a) burning the fossil fuel,...
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8017101 |
Precipitated calcium carbonate, method for producing the same and filler for loading paper using the same
Carbon dioxide containing gas is blown into a calcium hydroxide slurry having a calcium hydroxide concentration of 100 to 400 g/L obtained by wet slaking calcined lime with 4 N hydrochloric acid...
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8012443 |
Spherical calcium carbonate and method of producing the same
When spherical calcium carbonate is produced by blowing a carbon dioxide gas or a carbon dioxide-containing gas into an aqueous suspension containing calcium hydroxide to react them, after start of...
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8012445 |
Method and apparatus for manufacturing of a calcium carbonate product, the product and its use
A method and apparatus for producing a calcium carbonate product formed of small <100 μm sized separate calcium carbonate particles. Calcium hydroxide is fed through a disintegration and spraying ...
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7947239 |
Carbon dioxide capture and mitigation of carbon dioxide emissions
The present invention describes methods and systems for extracting, capturing, reducing, storing, sequestering, or disposing of carbon dioxide (CO2), particularly from the air. The CO2 extraction...
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7919067 |
Method and apparatus for controlling a causticizing process
A method and an apparatus for controlling a causticizing process, the process comprising slaking, causticizing and white liquor preparation. The slaking is carried out using a slaker into which...
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7883681 |
Synthetic carbide lime filler composition and method of making
A method for making a white synthetic carbide lime filler composition of calcium hydroxide and calcium carbonate, wherein the calcium carbonate is in the form of surface carbonation on the calcium...
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7879305 |
Apparatus and method for sequestering flue gas CO2
A fluidized bed reactor device for sequestering flue gas CO2 from a flue gas source is provided. The fluidized bed reactor device comprises an operating portion having a first end and a second end....
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7806978 |
Fine platy kaolin composition
The present invention relates to a kaolin composition having improved physical properties, for example, for use in the production of paper products. The composition can comprise kaolin having a...
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7754176 |
Spherical calcium carbonate and method for producing thereof
When spherical calcium carbonate is produced by blowing a carbon dioxide gas or a carbon dioxide-containing gas into an aqueous suspension containing calcium hydroxide to react them, after start of...
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7754169 |
Methods and systems for utilizing waste sources of metal oxides
Methods are provided for producing a composition comprising carbonates, wherein the methods comprise utilizing waste sources of metal oxides. An aqueous solution of divalent cations, some or all of...
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7731921 |
Process for sequestration of carbon dioxide
A process for sequestration of carbon dioxide comprising the following steps: (a) dispersing solid waste material comprising calcium oxide and a calcium-comprising mixed oxide in water to dissolve...
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7727374 |
Removing carbon dioxide from waste streams through co-generation of carbonate and/or bicarbonate minerals
Apparatuses and methods for removing carbon dioxide and other pollutants from a gas stream are provided. The methods include obtaining hydroxide in an aqueous mixture, and mixing the hydroxide with...
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7722850 |
Process for sequestration of carbon dioxide by mineral carbonation
The invention provides a process for sequestration of carbon dioxide by mineral carbonation comprising the following steps: (a) converting a magnesium or calcium sheet silicate hydroxide into a...
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7682589 |
Method for industrial manufacture of pure MgCO3 from an olivine containing species of rock
Method for industrial manufacture of pure MgCO3 comprising providing an olivine containing species of rock, to comminute the olivine containing species of rock to increase its surface, to contact...
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7614352 |
In-situ capture of carbon dioxide and sulphur dioxide in a fluidized bed combustor
Both a process and an apparatus whereby a fuel with both a high carbon content, a relatively high sulphur content and a relatively low ash content, can be combusted without the release of...
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7550127 |
Method for reducing exhaust carbon dioxide
A method for effectively absorbing and removing CO2 in an exhaust gas generated during an industrial process for reducing the amount of CO2 that is exhausted into the atmosphere. The exhaust gas...
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7504000 |
Method for producing a sheet of paper comprising calcite
The invention relates to a method for producing a sheet of paper (6) comprising paper fibres and calcium carbonate mainly in the form of calcite crystals linked directly to the paper fibres. The...
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7501107 |
Method for obtaining precipitated calcium carbonate particles of nanometric scale structure
Process for the production of precipitated calcium carbonate particles, structured at the nanoscale, by carbonation of milk of lime in the presence of a crystallization controller selected from the...
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7387769 |
Method and apparatus for continuous gas liquid reactions
A method and apparatus for improving contact between a liquid and a reactant gas by moving the liquid in a serpentine path that moves horizontally and vertically through individual chambers or...
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7378073 |
Lime treatment
Methods of obtaining a solution of calcium ions from lime (e.g. carbide lime) are disclosed. In one aspect the method comprises (i) treating the lime with an aqueous solution of a polyhydroxy...
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7371356 |
Method for the production of precipitated calcium carbonate with a high degree of brightness
Calcium carbonate with high brightness is prepared by treating calcium carbonate and/or the milk of lime used for its preparation by reacting milk of lime with carbon dioxide and/or at least one of...
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7361324 |
Precipitated calcium carbonate
A method for forming calcium carbonate is provided, the method comprising the steps of: (a) milling calcium hydroxide; (b) providing a reactor vessel containing a slurry of the milled calcium...
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7303794 |
Ink jet recording paper
A thermal ink jet recording paper, incorporating dewatered and milled precipitated calcium carbonate (“PCC”) is disclosed. Precipitated calcium carbonate is dewatered and milled in the presence of ...
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7135157 |
Process for the production of platy precipitated calcium carbonates
A process for the preparation of platy precipitated calcium carbonate comprising the steps of providing a suspension of calcium hydroxide, carbonating the suspension of calcium hydroxide, adding a...
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7128887 |
Platy precipitated calcium carbonate synthesis method
A process for the preparation of platy PCC comprising the steps of providing a suspension of calcium hydroxide, carbonating the suspension of calcium hydroxide, adding a condensed phosphate to the...
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7097819 |
Method for producing calcium carbonate
Calcium carbonate in the form of aragonite crystals suitable for use as a filler for papermaking to give useful properties for bulk, whiteness, opacity, wire abrasion and yield is obtained by...
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7060127 |
Silica-calcium carbonate composite particles
Silica-calcium carbonate composition particles having the characteristics of both synthetic silica and calcium carbonate are described along with paper having the particles internally filled...
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7048900 |
Method and apparatus for production of precipitated calcium carbonate and silicate compounds in common process equipment
A method and apparatus for the production of calcium carbonate and calcium silicate in common superatmospheric reactors. Multiple reactors can be provided for switching production between reactors,...
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6994839 |
Carbonate recycling in a hydrogen producing reaction
A process for producing hydrogen gas from a reaction of an organic substance and a base with a recycling of a carbonate or bicarbonate by-product and a regeneration of the base. In one embodiment,...
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6991677 |
Titanium dioxide-calcium carbonate composite particles
Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a...
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6808700 |
Dentrifice comprising calcium carbonate granules
A dentrifice comprising granules consisting essentially of calcium carbonate particles, the granules having an average size of 50 to 500 um and a crushing resistance of 1 to 20 g/granule, and the...
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6790424 |
Process for generation of precipitated calcium carbonate from calcium carbonate rich industrial by-product
An environmentally friendly process for the production of precipitated calcium carbonate suitable for industrial application from a calcium carbonate-rich by-product of a nitrophosphate fertilizer...
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6761869 |
Process for preparing precipitated calcium carbonate
According to the process, limestone is burned at a high temperature to form calcium oxide and, thereafter, calcium carbonate is formed from calcium oxide in the presence of water and carbonate ions...
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6699318 |
Process for preparing and modifying synthetic calcium carbonate
The present invention concerns a process for preparing calcium carbonate pigment from calcium oxide and/or calcium hydroxide and carbon dioxide in the presence of water. According to the invention,...
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6685908 |
Precipitated aragonite and a process for producing it
Disclosed is a novel form of particulate precipitated aragonite calcium carbonate and a novel process for producing it.
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RE38301 |
Paper coating pigments, their production and use
There is disclosed a method for the preparation of a precipitated calcium carbonate (PCC) for use as a pigment in paper coating compositions, the method comprising the steps of (a) carbonating an...
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6623555 |
Composite precipitated calcium carbonate/silicon compound pigment and method of making same
A method of making a composite pigment of precipitated calcium carbonate (PCC) and a silicon compound, in which the resulting composite pigment is endowed with an excellent combination of optical...
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6602484 |
Precipitated calcium carbonate and method for the production thereof
The invention concerns precipitated calcium carbonate products containing polynuclear regular agglomerates having a number of calcium carbonate particles (aggregates) attached to each other and...
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6500400 |
Process for preparing precipitated calcium carbonates
A process comprising introducing CO2 into milk of lime, in which the milk of lime is first ground, and then the CO2 is introduced to precipitate the calcium carbonate.
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6479029 |
Micronized alkaline earth metal carbonate
The invention concerns a micronized alkaline earth metal carbonate prepared with or without the use of an agent preventing crystal growth, and a process for its preparation and use. The prepared...
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6475459 |
Process for preparing calcium carbonate particles
The invention is related to a method for forming calcium carbonate. In the method, calcium oxide is reacted with carbonate ions in the presence of water to produce calcium carbonate. According to...
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6416727 |
Apparatus and process for the preparation of precipitated calcium carbonate
A process and an apparatus for the preparation of precipitated calcium carbonates calcium hydroxide using gaseous carbon dioxide, whereby the carbonation is performed in a gaseous phase by mixing...
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6402824 |
Processes for preparing precipitated calcium carbonate compositions and the products thereof
Processes for making high quality PCC compositions, and the resulting PCC products thereof. A precipitated calcium carbonate (PCC) composition is prepared by a process comprising the step of wet...
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6362261 |
Methods of preparing cationic layer compounds, cationic layer compounds prepared thereby, and methods of use therefor
A method of preparing a modified cationic layer compound which includes providing a layer compound of the general formula (I): [EeZzDdVv(OH−)x](An−)a.qH2O (I)wherein E represents one or more mon...
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6294143 |
Process for the preparation of discrete particles of calcium carbonate
A product and a process for the preparation of discrete calcium carbonate particles that result from preparing an aqueous calcium carbonate slurry containing carbohydrates, carbonating the aqueous...
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